On 4/25/2021 3:55 PM, Mattis Lind via cctalk wrote:
Den sön 25 apr. 2021 kl 22:43 skrev Josh Dersch via cctalk <
cctalk@classiccmp.org>:
Hi all --
In addition to the 11/45 project I'm also working on restoring an RF08/RS08
fixed head disk/controller (in the vain hopes of one day running TSS/8 on
my PDP-8/I). I have the power supply repaired and running and I'm getting
ready to power the logic up (the disc itself will be a project all its own,
once it arrives).
Fantastic. This thread sent me checking to see if I might have a DW08.
Doesn't seem that I do.
My notes indicate that somewhere I do have a DW8-E stashed somewhere -
at least the backplane - in offsite storage. I had forgotten about it.
If someone could use it, we could talk. [I suspect it was used to
connect a PDP-12 to an RK8E to run RK05's, but I have neither of those,
as far as I know.]
I also have another level shifter that I don't have documented (near as
I can tell). It is 11.5" high with M735 open collector modules, among
others, on it, but the label that I can see has faded to illegibility.
And as a result of investigating this in my PDP-12 notes, I found that
the power supply that Josh received from me had become a "donor" of a
rectifier bridge to my PDP-12 back in 1990. I suppose those wires were
just dangling on the unit when you received it.
I'd like to double-check that all the flip chips are in their right places;
I have no cause to think they've been shuffled around but I want to be
sure. The engineering docs have detailed schematics but no placement chart
for the modules themselves. Given enough time with the schematics I could
derive this chart but I'm saving that as a last resort. So, two
possibilities here:
Wise man.
1) Does anyone know of a document I've overlooked that includes module
placement?
2) Can someone with an RF08 and/or RS08 take a few detailed pictures of the
logic (from the handle side, of course) so I can compare? (Note: the
available RF08/RS08 pictures on the 'net are of the unit currently in my
possession, so are not useful in this regard!)
I have a RF08 / RS08 combo. It was connected to a PDP-8/L, but the cabinet
with the DW08 was missing.
I can take a bunch of pictures next weekend.
I have a vague idea that I have a bunch of docs with the unit. Double
ledger size or around A2. I will have a look.
Would be very interesting to read your story when repairing it!
/Mattis
Thanks!
- Josh
